const path = require("path");

function resolve(dir) {
  return path.join(__dirname, dir);
}

const port = 9538;

module.exports = {
  publicPath: "./",
  outputDir: "dist",
  assetsDir: "static",
  // lintOnSave: process.env.NODE_ENV === "development",
  lintOnSave: false,
  productionSourceMap: false,
  devServer: {
    port,
    open: true,
    overlay: {
      warnings: false,
      errors: true
    },
    proxy: {
      // 配置接口代理
      "/api": {
        target: process.env.VUE_APP_BASE_URL,
        changeOrigin: true,
        pathRewrite: {
          "/api": ""
        }
      }
    }
  },
  configureWebpack: {
    name: "极客试用",
    resolve: {
      alias: {
        "@": resolve("src")
      }
    }
  },
  chainWebpack(config) {
    // set svg-sprite-loader
    // config.module
    //   .rule("svg")
    //   .exclude.add(resolve("src/icons"))
    //   .end();
    // config.module
    //   .rule("icons")
    //   .test(/\.svg$/)
    //   .include.add(resolve("src/icons"))
    //   .end()
    //   .use("svg-sprite-loader")
    //   .loader("svg-sprite-loader")
    //   .options({
    //     symbolId: "icon-[name]"
    //   })
    //   .end();

    // set preserveWhitespace
    config.module
      .rule("vue")
      .use("vue-loader")
      .loader("vue-loader")
      .tap(options => {
        options.compilerOptions.preserveWhitespace = true;
        return options;
      })
      .end();

    config
      // https://webpack.js.org/configuration/devtool/#development
      .when(process.env.NODE_ENV === "development", config =>
        config.devtool("cheap-source-map")
      );

    config.when(process.env.NODE_ENV !== "development", config => {
      config
        .plugin("ScriptExtHtmlWebpackPlugin")
        .after("html")
        .use("script-ext-html-webpack-plugin", [
          {
            // `runtime` must same as runtimeChunk name. default is `runtime`
            inline: /runtime\..*\.js$/
          }
        ])
        .end();
    config.optimization.splitChunks({
        chunks: "all",
        cacheGroups: {
          libs: {
            name: "chunk-libs",
            test: /[\\/]node_modules[\\/]/,
            priority: 10,
            chunks: "initial" // only package third parties that are initially dependent
          },
          elementUI: {
            name: "chunk-vantUI", // split elementUI into a single package
            priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
            test: /[\\/]node_modules[\\/]_?vant(.*)/ // in order to adapt to cnpm
          },
          commons: {
            name: "chunk-commons",
            test: resolve("src/components"), // can customize your rules
            minChunks: 3, //  minimum common number
            priority: 5,
            reuseExistingChunk: true
          }
        }
      });
      config.optimization.runtimeChunk("single");
    });
  }
};
